Personal rail system using abandoned urban tracks

A couple in France, Helen Evans and Heiko Hansen who go by the name HeHe Association describe themselves as reverse cultural engineering the technological systems that surround us. They've got a lot of interesting concepts on their site that are worth checking out, but the one that caught my attention the other day was a personal rail system. The concept is to use abandoned rail and trolley tracks that span many cities around the world for personal transportation systems.

[Source: HeHe Association via CruncGear]